FI57634C - ANORDNING FOER ATT BYTA JAERNVAEGSSYLLAR - Google Patents

Description

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Patent · och registerstyrelsen '' Amöktn utlagd och utl. * Krift * n publlcand 30.05 * 00 (32) (33) (31) Pyydetty Muolk «ut — B« tlrd prlorltet (71) Konepaja Mankinen, Kuoppakatu 10, 11120 Riihimäki 12, Suomi-Finland (FI) (72) Mauri Mutikainen, Riihimäki, Suomi-Finland (FI) (7M Forssan & Salomaa Oy (5 * 0 Device for changing railway sleepers - Anordning för att byta järnvägssyllar

The invention relates to a device for removing railway sleepers from under railway tracks and, respectively, for placing new sleepers under railway tracks, which device comprises a beam-like part supported on the frame structure of a rail-moving vehicle, adapted to move back and forth removably mounted jaws, of which the jaws are for removing the sleeper and the jaws for positioning a new sleeper.

When rehabilitating a railway track, the sleepers under the rails have to be replaced. In the past, mainly wooden sleepers have been used as sleepers, but now concrete sleepers are increasingly used. In the past, the replacement of sleepers has been carried out with the help of manpower. Such work is slow and very heavy for workers. Efforts have now been made to mechanize this work, but no fully satisfactory device has yet been developed.

With regard to the state of the art, reference is made, for example, to Swedish Patent Publication 357,401, German Patent Publication 417 * 930 and U.S. Patent Publication Nos. 2,576,334 and 2,908,228. Previously known log changers operate either on the compaction principle (e.g., U.S. Pat. No. 2,735-375) or have a movable gripper head (e.g., Swedish Pat. No. 357-401).

The disadvantage of the sleeper changer according to Swedish patent publication 357-401 is that the jaws of the gripper head break the new concrete sleeper when it is put in place. Thus, previously known track sleeper replacement machines are only suitable for replacing wooden sleepers. Of course, with concrete solutions, concrete sleepers can also be removed, because then it does not matter whether the sleeper breaks or not. The problem, therefore, is to get new concrete sleepers, which are usually slightly tapered upwards and also curved inwards, quickly, in place without the risk of breakage.

The object of the invention is to provide a suitable device for changing railway sleepers, with which device work is easy and fast and with which new, also concrete sleepers can be put in place without the risk of breaking the sleeper. To achieve this object, the device according to the invention is mainly characterized in that the working surfaces of said positioning jaws are coated with rubber sheets or similar resilient surfaces, and that said positioning jaws are adjustable, preferably at an angle of ± 5 ° ·

The invention will be explained in detail with reference to a preferred embodiment of the invention shown in the figures of the accompanying drawings, to which, however, the invention is not intended to be exclusively limited.

Figure 1 shows axonometrically a preferred embodiment of the device according to the invention.

Figure 2 shows a side view of the device according to Figure 1.

Figure 3 shows a front view of the gripping head of the device according to the invention.

Figure 4 shows a front view of the gripping head of the device according to the invention with the positioning jaws of the sleeper.

Figure 5 shows a top view of the gripping head of the device according to the invention.

5,57634

Referring to Figure 1, the device according to the invention comprises a beam-like part 10 supported on a frame structure 13 of a vehicle (not shown) moving on rails 12, which is adapted to reciprocate in its longitudinal direction. The beam-like part, i.e. the push rod 10, can be supported e.g. between rollers arranged in the frame structure 13 and its reciprocating movement is provided by means of a suitable actuator, e.g. a working cylinder arranged inside the push rod 10. The device further comprises a movable gripper head 1 operatively connected to said beam-like part 10. In addition, the device comprises jaws 2 removably attached to the gripper head 1 for removing the sleeper 3 from under the rails 12 and respectively for placing a new sleeper under the rails 12.

According to Fig. 2, the gripper head 1 can be moved steplessly with respect to the vertical plane, preferably at an angle of + 30 ° to -15 ° · This is achieved by arranging an oblique stop 14 at the end of the beam-like part 10 and the above-mentioned movement of the gripper head 1 by the hydraulic cylinder 9 through. The cylinder 9 is mounted on the same shaft as the working cylinder which reciprocates the gripping head 1. In addition, the gripping head 1 can be moved longitudinally, preferably at an angle of + 10 ° to 25 ° (Fig. 5). · This movement is effected by a pivoting cylinder 11 attached to the gripping head 1. Furthermore, this pivoting movement is stepless.

According to Figures 3 and 4, in this embodiment, the gripper head 1 is provided with removal jaws 2 of a sleeper, e.g. a concrete sleeper, and with positioning jaws 2b of a new concrete sleeper, respectively. A fitting 6 is made in the jaws 2 and 2b, respectively, which fits on the rails 7 of the gripping head 1 with a clearance of about 0.5 mm. The working surfaces of the positioning jaws 2b are covered with rubber plates 5 (Fig. 4) * so that the new sleeper is not damaged when it is inserted. In addition, the positioning jaws 2b of the new sleeper preferably have a possibility of adjustment of about -5 °.

This is necessary, for example, due to the shape of currently used concrete sleepers. The use of two jaws is advantageous because the old concrete sleepers get iron fastening lugs 4, except for the breakage, which makes the discharge jaws 2 considerably more robust. Of course, the use of two jaws is not necessary, but the removal of old sleepers and, accordingly, the installation of new sleepers can be carried out by means of one and the same jaws. The compressive force on the jaws 2 and 4 57634 2b, respectively, is preferably provided, e.g. by means of a working cylinder 15 and lever arms 16 and 17.

The operation of the device according to the invention is as follows. The removal jaws 2 of the sleeper 3 are placed on the gripper head 1. The jaws 2 grip the end of the sleeper and the sleeper is pushed back and forth so that the gravel underneath it loosens and the sleeper can be pulled out. The sleeper is pulled about halfway under the rails 12 and then the gripper head 1 takes a new grip from the middle of the sleeper and pulls out the sleeper. In this embodiment, two grips are required because the length of the push rod 10 is only about 1.50-1.60 m. When the old sleeper is pulled out, the positioning jaws 2b of the new sleeper are replaced on the gripper head 1. The new sleeper is pressed with the end of the sleeper slightly downwards under the rail 12. In this position, the sleeper clears a suitable recess in the base layer under the rails 12. After the new sleeper has been pushed about halfway under the rails 12, a new grip on the sleeper 1 is taken with the gripper head 1 and the sleeper is pushed into place. Of course, the push rod 10 can also be made so long that it can pull the old sleeper out and correspondingly push the new sleeper under the rails 12 with only one grip.

Only one preferred embodiment of the invention has been described above, and it will be clear to a person skilled in the art that numerous modifications can be made to the device according to the invention. The movement of the push rod of the device according to the invention can be performed in other ways and with actuators. Likewise, the movements of the gripping head described above and the movement of the jaws attached to the gripping head can be realized by other mechanisms known per se. The scope of the invention is therefore determined within the scope of the inventive idea defined in the appended claims.